Just ping since some patches are meaningful for further fixes.
On 01/11/2018 03:34 PM, Su Yue wrote:
This patchset can be fetched from my github: https://github.com/Damenly/btrfs-progs/tree/lowmem based on kdave/devel.
It can be rebased to kdave/master now but not changing kdave/devel. And the below solves little conflicts with kdave/devel: https://github.com/Damenly/btrfs-progs/tree/lowmem_dev Thanks, Su
Thanks to Qu Wenruo's ideas and suggestions first. Patch[1-3] fix minor problems of lowmem repair. Patch[4-8] introduce two ways to avoid extents overwrite: 1) Traverse trees and exclude all metadata blocks. It's time-inefficient for large filesystems. 2) Mark all existed chunks full, allocate new chunk for CoW and records chunk start. If the last allocated chunk is almost full, allocated a new one. 2) is More efficient than 1). However, it can't handle situations like no space(fsck/004). Lowmem repair will try method 2 first and then method 1. Patch[9-17] remove parameters @trans in functions for lowmem repair. They try to avoid extents overwrite if necessary and start transactions by themselves. Those patches are mainly for lowmem repair. Original mode is not influenced. --- Changlog: v2->v3: - check_btrfs_root() returns FATAL_ERROR if check_fs_first_inode() failed. Thanks Nikolay Borisov. - Add function try_to_force_cow_in_new_chunk() and global u64 varaiable to record start of the last allocated chunk. - Remove unused EXTENTS_PIN in enum lowmem_extents_operation.v1->v2:- Let @err in check_btrfs_root() record err bits but excluded negative values. - Do not delete a line of code to release path after extent item' insertion in repair_extent_data_item(). - Add patch[3]. - Force CoW in new allocated chunk to avoid extents overwrite. - Remove parameters @trans in check_chunks_and_extents_v2() and related callees. - Repair functions for lowmem mode call try_avoid_extents_overwrite() and start transactions.Su Yue (17):btrfs-progs: lowmem check: release path in repair_extent_data_item() btrfs-progs: lowmem check: record returned errors after walk_down_tree_v2() btrfs-progs: lowmem check: assign @parent early in repair_extent_data_item() btrfs-progs: lowmem check: exclude extents of metadata blocks btrfs-progs: lowmem check: introduce mark/clear_block_groups_full() btrfs-progs: lowmem check: introduce force_cow_in_new_chunk() btrfs-progs: lowmem check: introduce try_avoid_extents_overwrite() btrfs-progs: lowmem check: exclude extents if init-extent-tree in lowmem btrfs-progs: lowmem check: start to remove parameters @trans in lowmem btrfs-progs: lowmem check: remove parameter @trans of delete_extent_item() btrfs-progs: lowmem check: remove parameter @trans of repair_chunk_item() btrfs-progs: lowmem check: remove parameter @trans of repair_extent_item() btrfs-progs: lowmem check: remove parameter @trans of check_leaf_items() btrfs-progs: lowmem check: remove parameter @trans of repair_tree_back_ref() btrfs-progs: lowmem check: remove parameter @trans of check_btrfs_root() btrfs-progs: lowmem check: introduce repair_block_accounting() btrfs-progs: lowmem check: end of removing parameters @trans in lowmem cmds-check.c | 710 ++++++++++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 604 insertions(+), 106 deletions(-)
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